M
Myron Samila
- Jan 1, 1970
- 0
Ok,
I've read some discussion here about pulsing LEDs to achieve higher output without burning
the stupid things out. (Instead of CW).
I'm just working on a circuit for general purpose low voltage illumination, but want to
achieve maximum output.
I suppose a pulse of 100Hz would be decent? This would allow more voltage to be applied
to the LED without overheating it.
So I was thinking of using a 555timer triggering a transistor (of what type?) handling
approx 25 LEDs (no specific data on the LED yet, I haven't gotten that far ie: current,
voltage, etc..., I'm researching that now).
I have a basic schematic that shows a 555 triggering such a circuit, just what transistor
should work for me if I want to lets say switch a 6VDC/1A load?
Any info would be great, thanks!
BTW: I believe it was "Watson" that was telling us about his white LEDs that weren't
lasting very long, well, I've been seeing a lot more white LED applications such as
crossing lights, while the duty cycle is quite low, I suppose they expect these crossing
lights (you know the picture of the person walking!) to last quite a while.
From what I understand, the Osram LEDs are of excellent quality, and priced a wee bit
higher than the rest as well.
I've read some discussion here about pulsing LEDs to achieve higher output without burning
the stupid things out. (Instead of CW).
I'm just working on a circuit for general purpose low voltage illumination, but want to
achieve maximum output.
I suppose a pulse of 100Hz would be decent? This would allow more voltage to be applied
to the LED without overheating it.
So I was thinking of using a 555timer triggering a transistor (of what type?) handling
approx 25 LEDs (no specific data on the LED yet, I haven't gotten that far ie: current,
voltage, etc..., I'm researching that now).
I have a basic schematic that shows a 555 triggering such a circuit, just what transistor
should work for me if I want to lets say switch a 6VDC/1A load?
Any info would be great, thanks!
BTW: I believe it was "Watson" that was telling us about his white LEDs that weren't
lasting very long, well, I've been seeing a lot more white LED applications such as
crossing lights, while the duty cycle is quite low, I suppose they expect these crossing
lights (you know the picture of the person walking!) to last quite a while.
From what I understand, the Osram LEDs are of excellent quality, and priced a wee bit
higher than the rest as well.